Engineer&#39;s brake-valve and graduating mechanism for same.



N0. 665,340. Patented Jan. I, I90l.

J. E. NORMAND. ENGINEER'S BRAKE VALVE AND GRADUATING MEGHIlNISM FOB SAME.

(Application filed May 28, 1897..

(No Model.)

WITNESSES: u

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JOSEPH E. NORMAND, OF WATERTOl/VN, NEW YORK, ASSIGNOR OF ONE- I-IALF TO JOSEPH R. ELLICOTT, OF NYACK, AND CHARLES A. BALL, OF

NEW YORK, N. Y.

ENGINEERS BRAKE-VALVE AND GRADUATING MECHANISM FOR SAME.

SPECIFICATION forming part of Letters Patent No. 665,340, dated January 1, 1901.

Application filed May 28, 1897. serial No. 638 ,602. (No model.)

T0 whom it may concern:

Be it known that I, JOSEPH E. NORMAND, a citizen of the United States, residing at Watertown, in the State of New York, have invented certain Improvements in Engineers Brake-Valves and Graduating Mechanism for Same, of which improvements the following is a specification.

My improvements relate to an improved construction of an engineers valve mechanism for operating an automatic air brake mechanism and to an apparatus for measuring graduation exhaust from the train-pipe.

In the drawings, Figure l is a plan view of valve, showing different positions of engineers handle. Fig. 2 is a transverse section at the lines Y Y and X X of Fig. 3. Fig. 3 is a longitudinal section at the line Z Z of Fig. 1. Fig. 4: is a side view of handle 7 and spring 8.

In the views, 1 indicates the casing of the valve mechanism; 2, the train-pipe connection; 3, the train-pipe exhaust-port; 4:, the main-reservoir connection; 5, the hand-valve; 6, the driver for hand-valve; 7, the handle; 8, the stop-spring; 9, the adjusting-screw for stop-spring; 10, the lock-screw for driver and valve; 11, the graduation-pin; 12, the graduation-piston; 13, the returning and regulating spring; 14:, the expansion-chamber space; 15, the pipe leading to the expansion-chamber; 16, the feed-port to expansion-chamber, and 17'the equalizingport between expansion-chamber and train-pipe in emergency position. 4

The operation is as follows: In the running position reservoir-air is feeding through small hole 18, passage 19, and port 20 to the trainpipe. W hen it is desired to make a graduation application, the engineer will turn the hand valve to graduation position, cutting off reservoir communication and connecting trainpipe with exhaust-port 3 through passage 19, port 20, and small holes 22, and at the same time pin 11 will raise piston 12 above feedport 16, cutting 0E train-pipe communication with expansion-chamber, thereby preventing exhaust from said chamber. After such an amount of air has been discharged from the brake-pipe as is requisite to apply the brakes with determined force the preponderance of pressure in the expansion-chamber over the train-pipe will force piston 12 to return valve 5 to lap position, when all ports are closed. When an emergency application of the brakes is called for, the engineer will turn his handle to the corresponding position, cutting off reservoir communication and connecting train-pipe with exhaust-port 3 through the full opening of passage 19 and port 20. The full discharge of air from the brake pipe provides for the application of the brakes as required in making emergency stops.

1 claim as my invention and desire to secure by Letters Patent 1. .In an engineers brake-valve, the com bination with a valve-casing and a rotatable valve fitted thereto, of a cylinder and a reciprocating piston therein, the said piston actuated by fluid-pressure, a spring adapted to augment the fluid-pressure upon the piston in one direction, the said reciprocating piston in one of its movements adapted to impart a rotary movement to the said valve.

2. In an engineers brake-valve, the combination of a valve-casing and a valve fitted thereto, said valve in its movement controlling a plurality of ports, means for operating the valve through any and all portions of its stroke by hand, and means independent of the hand operated means for moving the valve through a portion of its stroke by fluidpressure but whereby the valvewill be free of the fluid-pressure-operated means, and adapted to be operated by hand through the balance of its stroke.

3. In an engineers brake-valve the combination of a valve-casing and a valve fitted thereto, said valve in its movement controlling a plurality of ports, means for operating said valve by hand, a cylinder, and a piston mounted therein, a piston-rod carried by said piston and a projection on said valve, said piston-rod adapted to engage said projection to move said valve through a portion only of its stroke, said valve operated through the remaining portion of its stroke by the handoperated means, independent of said automatic means.

4. In an engineers brake-valve, the combination of a valve-casing and a valve fitted thereto of means for moving the valve to. various predetermined positions by hand, said valve in such various predetermined positions controlling the fiow of fluid through a plurality of ports, and automatic means for returning said valve at certain times to one of said predetermined positions from other positions in which it may have been set, said valve having one or more positions, other than said return position, to which it may be moved by hand, and at which it will not be affected by said automatic means.

5. In an engineers brake-valve the combination with a casing having a plurality of ports and a valve contained in said casing having a passage adapted when in position opposite certain of said ports to connect same of a cylinder and piston mounted therein one end of said cylinder being in free communication at all times with one of said ports, a passage leading to the other end of said cylinder adapted to be closed upon the movement of the piston in one direction, and means whereby the said valve may be operated at certain times by the movement of said piston.

6. In an engineers brake-valve the combination of a valve having an exhaust-port, a train-pipe connection and a connection to a source of fluid-pressure supply of a valve fitted therein adapted to connect said trainpipe connection with said exhaust or said fluid-pressure connection according to the relative position of the valve with said ports or connections, a cylinder, a piston therein, said cylinder being in communication on one side of said piston with said train-pipe connection at all times but adapted to be cut off from such communication on the other side of said piston upon a movement thereof in one direction, and means whereby the said valve maybe operated at certain times by the movement of said piston.

JOSEPH E. NORMAND. Witnesses:

' D. D. KIEFF,

CHAS. E. DEWEY. 

